<div style="height: 20px;"></div>
<ngb-accordion #acc="ngbAccordion" activeIds="ngb-panel-0">

  <ngb-panel title="课件资源">
    <ng-template ngbPanelContent>

      <ol>
        <li *ngFor="let courseware of courseware_names">
          <a href="javascript:void(0)" (click)="download(courseware)"><b>{{ courseware }}</b></a>
          <hr>
        </li>
      </ol>
    </ng-template>
  </ngb-panel>

</ngb-accordion>
